If I were you, I'd look at a wheelset with no fewer than 32 spokes front and rear.

If you're popping spokes on your current set because of harsh terrain, you don't want to be dealing with Mavic for repairs on their proprietary wheelset. You just don't.

You might want to look at builds like this: WTB Frequency I23 29er Tubeless Mountain Bike Wheelset SRAM x9 Hub 6 Bolt Disc | eBay

Stronger than Aksiums, easily available replacement components, reasonable price.